aromatization of hantzsch 1,4- dihydropyridines with zinc chlorochromate nonahydrate
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abstract
hantzsch 1 ,4- dihy&opyridines; are rapidly oxidized to the corresponding pyridine derivatives using zinc chlorochromate nonahydrate [zn(c1cro ) .9h o] in dichloromethane at room temperature. in addition to aromatization, no loss of the 4- substituent is observed
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AROMATIZATION OF HANTZSCH 1,4- DIHYDROPYRIDINES WITH ZINC CHLOROCHROMATE NONAHYDRATE
Hantzsch 1 ,4- dihy&opyridines are rapidly oxidized to the corresponding pyridine derivatives using zinc chlorochromate nonahydrate [Zn(C1CrO ) .9H O] in dichloromethane at room temperature. In addition to aromatization, no loss of the 4- substituent is observed
full textSynthesis and Aromatization of Hantzsch 1 , 4 - Dihydropyridines under Microwave Irradiation . An Overview
Domestic microwave ovens as well as laboratory reactors have been successfully employed to prepare dialkyl 1,4-dihydropyridine-3,5-dicarboxylates and to induce the synthesis of the corresponding aromatic derivatives. In that latter particular case, unexpected results have been reported.
full textN,N'-ethylene-bis(benzoylacetoniminato) copper (II), Cu(C22H22N2O2), a new reagent for aromatization of Hantzsch 1,4-dihydropyridines.
A variety of Hantzsch 1,4-dihydropyridines were oxidized to their corresponding pyridines in high yields in the presence of Cu(C22H22N2O2) in refluxing acetic acid.
full textAROMATIZATION OF 1,4-DIHYDROPYRIDINES WITH FREE RADICAL REAGENTS
Oxidation of different types of 1,4-dihydropyridines with diphenylpicrylhydrazyl (DPP) and benzoyl peroxide (Bz2O2) as free radical oxidizing agents to pyridine derivatives is reported and a mechanism for this oxidation is also proposed.
full textOxidation of Hantzsch 1,4- Dihydropyridines to Pyridines with Thallium Triacetate
Hantzsch 1, 4-dihydropyridines (1,4-DHPs) can be oxidized to the corresponding pyridine derivatives by thallium triacetate in high yields.
full text“On-Water” Catalyst-Free Ecofriendly Synthesis of the Hantzsch Dihydropyridines
An eco-friendly "on-water" protocol for efficient catalyst-free synthesis of the Hantzsch dihydropyridines from aryl, heteroaryl, alkyl, and vinylogous aldehydes has been developed with minimum auxiliary substances, toxic reagents, organic solvents, and disposal problems.
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Journal title:
journal of sciences islamic republic of iranجلد ۸، شماره ۳، صفحات ۰-۰
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